Welcome to our community! Here you can share advice and tips with thousands of other Microsoft mobile devices users around the world in English. Please take a moment to read our community guidelines for more information. Everyone can search and read the discussions, but to post your own question or reply to others you need to sign in first. If this is your first time here, you can choose an alias to represent you. If you don't have an account yet, please register here.

It's not a bug. More like a perhaps a bit of dust or screen protector in the way or a faulty sensor. If it's not the first 2 then you should send your phone to your local Nokia Care Point to have them check it for number 3.

have you tried the other methods stated in this thread? if they don't work, then you can try a hard reset (Settings > About > Reset your phone). bear in mind that this wipes all your personal data, so please make backup to PC and/or online storage first.

Add one more to the list. This is a VERY frustrating bug - it makes the phone unusable as a phone. This is a bug and not dust in the phone. Doing a hard reset is not a good option from Nokia - that is a loss of all app-specific data never mind all the time to re-setup the phone etc.

Phone is powerful, Win8 is a great user experience, but this bug is a disaster. I certainly hope Nokia takes notice of the fact that there is clearly a pattern here. Let's get this fixed please.